A121174 Sequence S with property (making all terms distinct) that (i) a(1)=3, (ii) for n is S, a(n)=a(1)+a(2)+...+a(n-1), (iii) for n not in S, a(n)=the smallest number different from a(1), ..., a(n-1) not breaking condition (ii).

3, 4, 7, 14, 6, 34, 68, 9, 145, 11, 301, 13, 615, 1230, 16, 2476, 18, 4970, 20, 9960, 22, 19942, 24, 39908, 26, 79842, 28, 159712, 30, 319454, 32, 638940, 35, 1277915, 2555830, 37, 5111697, 39, 10223433, 41, 20446907, 43, 40893857, 45

Offset

1,1

Links

Table of n, a(n) for n=1..44.

Crossrefs

Cf. A105753, A121053, A121174, A121175.

Sequence in context: A092406 A250297 A254310 * A050071 A041002 A062203

Adjacent sequences: A121171 A121172 A121173 * A121175 A121176 A121177

Keyword

nonn

Author

Max Alekseyev, Aug 15 2006

Status

approved